GFDL - Geophysical Fluid Dynamics Laboratory

Gareth Williams – Figures

Color Figures

Case JG1a at Day 550, Case JG1a at Day 1540, Case Galileo

Argo Figure Set 01

From JGR 1997

3-D vortex form

HTML clipboardWilliams, G. P., 1997:

Planetary vortices and Jupiter’s vertical structure.

Journal of Geophysical Research, 102 (E4), 9303-9308.

Abstract: Measurements of the vertical structure of Jupiter’s circulation have recently been made near the equator by the Galileo spacecraft probe.In other regions, planetary vortices exist selectively for a limited range of generic (exponential) vertical forms and can be used to probe the atmospheric structure theoretically. A study of vortex genesis with a three-dimensional numerical model produces reasonably realistic simulations of the Great Red Spot for both the generic and galilean forms, provided that Jupiter’s winds do not extend much beyond a 500 km depth. But the actual depth of the winds remains uncertain.

Classic Figures

Jupiter’s zonal winds – from 1985 Fig.03 p398

latitudinal profile imposed on cloud image

barotropic jet genesis – from 1978 Fig.16

eddies drive waves drive jets

equatorial jet genesis – from 1978 Fig.18

tropical eddies drive equatorial jet

quasi-geostrophic jet genesis – from 1979 Fig.14

baroclinic eddies drive multiple jets

shallow layer vortex genesis 1 – from 1984 Fig.16

unstable easterly jets generate one or more vortices

shallow layer vortex genesis 2 – from 1988 Fig.27

stochastically forced eddies merge into single vortex

global circulation range – from 1988 Fig.02

number of zonal jets changes as rotation rate of Earth model

varies from 0 to 8 times standard rate ( omega*=1 )

single 3-D vortex genesis – from 1996 Fig.31

unstable easterly jets lead to single baroclinic vortex

multi 3-D vortex genesis 200-0750 days – from 1996 Fig.33a

unstable easterly jets lead to multiple vortex mergers

multi 3-D vortex genesis 800-2500 days – from 1996 Fig.33b

unstable easterly jets lead to multiple vortex mergers

galilean 3-D vortex genesis – from 1997 Fig.02

unstable jets with Galileo probe structure give single vortex

single 3-D vortex oscillation – from 1997 Fig.05

oscillation in vortex longitude and amplitude

resembles GRS 90-day fluctuation

vertical structure of 3-D vortex – from 1997 Plate 01

Carina or keel shape suggested for Great Red Spot ( GRS )